Affliction befalls the believers who enjoin the good and forbid the evil?

Verses 16-17 of Chapter 31:

(And Luqman had said:) "My son, even if a thing be equal to a grain of mustard seed and hidden in a rock, or in the heavens, or in the earth, Allah will bring it forth. He is Knower of subtleties and is All-Aware. O my son. establish the Salat, enjoin good, forbid evil and bear with fortitude every affliction that befalls you. These are the things which have been strictly enjoined.